Method for operating a production well in an oxygen driven in-si

Details Method for operating a production well in an oxygen driven in-si Method for operating a production well in an oxygen driven in-si

1983-12-28

1986-07-08

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

166 53, 166 64, 166261, E21B 43243, E21B 4706

Patent

active

045987726

ABSTRACT:
A method for operating a production well during an oxygen driven in-situ combustion oil recovery process comprising continuously injecting an inert gas such as nitrogen or carbon dioxide into the bottom of the production well at a predetermined low injection rate, preferably 0.1 to 2 MSCF/day, and continuously monitoring the oxygen concentration of the produced effluent gas and the bottomhole temperature of the production well. In the event that the oxygen content of the effluent gas increases to a value within the range of 5 to 20 volume percent or the bottomhole temperature of the production well increases to a value within the range of 200.degree. to 300.degree. F., the injection rate of the inert gas into the bottom of the production well is increased to a maximum rate until the oxygen concentration of the effluent gas and the bottomhole temperature are reduced to a safe level.

REFERENCES:
patent: 3202219 (1965-08-01), Parker
patent: 3240270 (1966-03-01), Marx
patent: 3406755 (1968-10-01), Sharp
patent: 3454365 (1969-07-01), Lumpkin et al.
patent: 3470954 (1969-10-01), Hartley
patent: 4450910 (1984-05-01), Hunt, III
patent: 4474237 (1984-10-01), Shu

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